Warm Weather Boosts Corn and Soybean Growth

Ontario Crop Update Warmer Weather Boosts Growth

After weeks of cold weather, the skyrocketing heat was welcome in Ontario.  Ontario’s field crops are showing positive growth trends, according to Ontario’s Field Crop News, though several challenges remain due to weather shifts and pest threats. 

Corn planting is now complete. Most corn is between the V3 and V6 stages, with early fields nearing canopy closure. Warm weather in Southern Ontario has supported strong growth.  

However, according to experts, weed control has been inconsistent and zinc deficiency is present in some areas. Tar Spot, seen recently in neighboring U.S. states, is expected to appear in Ontario by early July. Farmers are advised to scout fields and prepare fungicide applications. 

Around 95% of soybean fields are planted. Early plantings are near flowering, while May-planted beans are in the trifoliate stages. According to Ontario’s Field Crop News, emergence issues are tied to seed corn maggot, crusting, and heavy residue. Replanting has occurred in affected areas, especially on sandy soils.  

Weed control with glyphosate and pre-emergent herbicides has varied in success, with some group 15 herbicide injury observed. Ontario’s Field Crop News experts remind IP soybean growers to confirm herbicide safety with buyers. 

Winter wheat has largely passed the fusarium spray window. Most fields received T3 fungicide, providing 14 days of protection against stripe rust. According to Ontario’s Field Crop News, stripe rust is appearing in certain areas, though warmer weather may slow its spread.  

Cereal leaf beetles and aphids are also active and may spread to spring cereals. Frequent monitoring is recommended. 

For more information about the cereal leaf beetle, please visit the Farms.com Field Guide Pest pages.

Photo Credit: gettyimages-oticki